Conjurers Trinket and slayer groups question

Wondering about the effect of using a Conjurers Trinket for its HCI when fighting Succubus.

Since the Conjurers Trinket also has the property of the Undead Slayer - and the Succubus is in the Abyss or Demon slayer "group" - can I assume that the Succubus will NOT be hitting me with double damage - since the Abyss group is NOT the opposite of the Undead group?

Stratics is the oldest continually running MMORPG Fansite on the Internet. Founded in 1997 Stratics has served the Ultima Online Community for 18 years. We strive to provide the most complete social experience for Ultima Online players.